Пример #1
0
func (mn *MasterNodes) findMaster() (string, error) {
	master := mn.GetMaster()
	if master != "" {
		return master, nil
	}
	mn.mutex.Lock()
	defer mn.mutex.Unlock()
	if len(mn.nodes) == 0 {
		return "", errors.New("No master node found!")
	}
	if mn.master == "" {
		for _, m := range mn.nodes {
			glog.V(4).Infof("Listing masters on %s", m)
			if masters, e := operation.ListMasters(m); e == nil {
				if len(masters) == 0 {
					continue
				}
				mn.nodes = append(masters, m)
				mn.master = mn.nodes[rand.Intn(len(mn.nodes))]
				glog.V(2).Infof("current master nodes is (nodes:%v, master:%s)", mn.nodes, mn.master)
				break
			} else {
				glog.V(4).Infof("Failed listing masters on %s: %v", m, e)
			}
		}
	}
	if mn.master == "" {
		return "", errors.New("No master node available!")
	}
	return mn.master, nil
}
Пример #2
0
func (mn *MasterNodes) FindMaster() (string, error) {
	if len(mn.nodes) == 0 {
		return "", errors.New("No master node found!")
	}
	if mn.lastNode < 0 {
		for _, m := range mn.nodes {
			glog.V(4).Infof("Listing masters on %s", m)
			if masters, e := operation.ListMasters(m); e == nil {
				if len(masters) == 0 {
					continue
				}
				mn.nodes = append(masters, m)
				mn.lastNode = rand.Intn(len(mn.nodes))
				glog.V(2).Infof("current master nodes is %v", mn)
				break
			} else {
				glog.V(4).Infof("Failed listing masters on %s: %v", m, e)
			}
		}
	}
	if mn.lastNode < 0 {
		return "", errors.New("No master node available!")
	}
	return mn.nodes[mn.lastNode], nil
}